Sitting on top of the world! Nate Berkus and his boyfriend, Jeremiah Brent, are officially engaged to be wed, a rep for Berkus tells Us Weekly exclusively. The pair, who have been dating for 8 1/2 months, made it official atop Machu Picchu in Peru on Monday -- and are excited for the next chapter of their lives together.

TV personality and interior designer Berkus, 41, was the one to pop the question to Brent during their trip to Peru, Berkus' rep confirms to Us. Brent was completely surprised -- the couple was originally traveling as part of a shopping trip with One Kings Lane for a designer sale project Berkus is working on for the site.